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단순 신낭종에서 경피적 흡인술 후 99% Ethanol 및 Povidone iodine 청화요법의 장기추적 성적
박부경,이상돈,김석 부산대학교 병원 암연구소 2007 부산대병원학술지 Vol.- No.21
Purpose: Percutaneous aspiration with sclerotherapy has become widely used as a treatment of the symptomatic, large simple renal cysts because of its minimal invasiveness and high effectiveness. We studied to assess the long-term outcome of sclerotherapy using 99% ethanol or povidone iodine after percuatneous aspiration of the simple renal cyst. Methods: Total of 46 cases of simple renal cysts from July 2000 to February 2006 were divided into group I (percutaneous aspiration only; n= lO), II (percutaneous aspiration with sclerotherapy using 99% ethanol; n=28) and III (percutaneous aspiration with sclerotherapy using povidone iodine; n=8). We evaluated age, sex, cyst size, locations, success rate, complication rate, recurrence rate and follow-up period. The follow-up ultrasonography was performed at posttreatment 3-6 month and then every 6 months. The recurred cases were retreated with the same procedure. Results: Mean age of total patients and mean follow up period were 56.6 ± 14.3 years (8-76) and 26.2± 17.4 months (6-60) , respectively. There was no statistical differences of age in three groups (Group I; 54.1 ±21.5, II; 60.8±9.7 and III; 59.4± 10.1; p>0.05). The symptoms associated with renal cysts were abdominal or flank pain (n=19), palpable abdominal mass (n=3) and dyspepsia (n=l). Complete and partial response rates were 10%, 20% in group I, 14.3%, 71.4% in group II and 0%, 62.5% in group III , respectively (p<O.Ol). Recurrence rates in group I, II, and III were 70%, 14.3% and 37.5%, respectively (p<0.05). Four patients complained flank pain, facial flushing, and dizziness associated with the procedures, which were spontenous1y resolved. Conclusion: The percutaneous aspiration with sclerotherapy using either 99% ethanol or povidone iodine solution appears to be more effective treatment options to prevent recurrent renal cyst than aspiration only.
부상돈,Bu Sang Don 한국진공학회 2004 Applied Science and Convergence Technology Vol.13 No.4
RF magnetron sputtering 방법으로 miscut된 기판을 이용해서 양질의 압전 산화물 에피 박막을 제작하였다. 박막은 (001) $SrTiO_3$ 기판 위에 증착되었으며, (100) 방향으로 $0^{\circ}$-$8^{\circ}$의 miscut 각도를 갖는 기판들을 사용했다. $4^{\circ}$이상의 큰 miscut 각도를 갖는 기판 위에 성장된 박막의 경우, x-ray diffraction (XRD) 패턴은 perovskite 상의 순수한 PMN-PT 피크만을 보여 주었으며, wavelength dispersive x-ray fluorescence spectroscopy를 이용해서 분석한 조성비는 stoichiometric한 조성비에 가까운 값을 보여주었다. 반면에, miscut 각도가 없는 기판 위에 증착된 박막의 경우, 2차상인 pyrochlore 상을 포함하는 XRD 패턴을 보여주었다. $8^{\circ}$ 기판 위에 성장된 박막의 경우 실온에서 20$\mu$C/$\textrm{cm}^2$라는 높은 잔류분극 값을 보여주었다 We have grown piezoelectric oxide films by RF magnetron sputtering using miscut substrates. Films were Brown on(001) $SrTiO_3$ substrates with miscut angles from 0 to 8 degrees toward the (100) direction. Films on high miscut substrates (>$4^{\circ}$) showed almost the pure perovskite phase in x-ray diffraction and were nearly stoichiometric. In contrast, films on exact (001) $SrTiO_3$ contained a high volume fraction of pyrochlore phases. A film on an $8^{\circ}$ miscut substrate exhibits a polarization hysteresis loop with a remnent polarization of 20$\mu$C/$\textrm{cm}^2$ at room temperature.
Kim Eun-Young,Bu Sang Don 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.77 No.12
In this study, Bi4-xNdxTi3O12 (BNdT), in which neodymium is substituted into Bi4Ti3O12 (BiT) with a bismuth layer-structured ferroelectrics (BLSFs) structure, was deposited on a Pt/Ti/SiO2/Si substrate by using pulsed laser deposition (PLD). The BNdT film is known to exhibit structural and electrical anisotropy with the reported maximum spontaneous polarization (Ps) along the a axis (~55 μC/cm2) and the c axis (~5 μC/cm2). The ability of BNdT to control the structural change with growth orientation is key to its enhanced properties. In a PLD system, a few important factors, such as deposition temperature, oxygen pressure, and energy fluence, are responsible for the structural variation. We aimed to enhance the structural properties of polycrystalline BNdT film, so we investigated the change in the orientation of BNdT film according to PLD deposition conditions. To identify the mechanism of structural change according to deposition conditions, we used X-ray diffraction to analyze the film's orientation and to calculate the lattice constants and the crystallite size. We also used field emission scanning electron microscopy (FE-SEM) to assess the surface morphology and the grain shape of the BNdT films.